<template>
  <section class="main">
    <div class="crumbs">
      <el-breadcrumb separator="/">
        <el-breadcrumb-item><i class="el-icon-rank" /> 拖拽组件</el-breadcrumb-item>
        <el-breadcrumb-item>拖拽排序</el-breadcrumb-item>
      </el-breadcrumb>
    </div>
    <div class="container">
      <div class="plugins-tips">
        Vue.Draggable：基于 Sortable.js 的 Vue 拖拽组件。
      </div>
      <div class="drag-box">
        <div class="drag-box-item">
          <div class="item-title">todo</div>
          <draggable v-model="todo" :options="dragOptions" @remove="removeHandle">
            <transition-group id="todo" tag="div" class="item-ul">
              <div v-for="item in todo" :key="item.id" class="drag-list">
                {{ item.content }}
              </div>
            </transition-group>
          </draggable>
        </div>
        <div class="drag-box-item">
          <div class="item-title">doing</div>
          <draggable v-model="doing" :options="dragOptions" @remove="removeHandle">
            <transition-group id="doing" tag="div" class="item-ul">
              <div v-for="item in doing" :key="item.id" class="drag-list">
                {{ item.content }}
              </div>
            </transition-group>
          </draggable>
        </div>
        <div class="drag-box-item">
          <div class="item-title">done</div>
          <draggable v-model="done" :options="dragOptions" @remove="removeHandle">
            <transition-group id="done" tag="div" class="item-ul">
              <div v-for="item in done" :key="item.id" class="drag-list">
                {{ item.content }}
              </div>
            </transition-group>
          </draggable>
        </div>
      </div>
    </div>
  </section>
</template>

<script>
import draggable from 'vuedraggable'
export default {
  name: 'Draglist',
  components: {
    draggable
  },
  data() {
    return {
      dragOptions: {
        animation: 120,
        scroll: true,
        group: 'sortlist',
        ghostClass: 'ghost-style'
      },
      todo: [
        {
          id: 1,
          content: '开发图表组件'
        },
        {
          id: 2,
          content: '开发拖拽组件'
        },
        {
          id: 3,
          content: '开发权限测试组件'
        }
      ],
      doing: [
        {
          id: 1,
          content: '开发登录注册页面'
        },
        {
          id: 2,
          content: '开发头部组件'
        },
        {
          id: 3,
          content: '开发表格相关组件'
        },
        {
          id: 4,
          content: '开发表单相关组件'
        }
      ],
      done: [
        {
          id: 1,
          content: '初始化项目，生成工程目录，完成相关配置'
        },
        {
          id: 2,
          content: '开发项目整体框架'
        }
      ]
    }
  },
  methods: {
    removeHandle(event) {
      console.log(event)
      this.$message.success(`从 ${event.from.id} 移动到 ${event.to.id} `)
    }
  }
}

</script>

<style scoped>
    .drag-box{
        display: flex;
        user-select: none;
    }
    .drag-box-item {
        flex: 1;
        max-width: 330px;
        min-width: 300px;
        background-color: #eff1f5;
        margin-right: 16px;
        border-radius: 6px;
        border: 1px #e1e4e8 solid;
    }
    .item-title{
        padding: 8px 8px 8px 12px;
        font-size: 14px;
        line-height: 1.5;
        color: #24292e;
        font-weight: 600;
    }
    .item-ul{
        padding: 0 8px 8px;
        height: 500px;
        overflow-y: scroll;
    }
    .item-ul::-webkit-scrollbar{
        width: 0;
    }
    .drag-list {
        border: 1px #e1e4e8 solid;
        padding: 10px;
        margin: 5px 0 10px;
        list-style: none;
        background-color: #fff;
        border-radius: 6px;
        cursor: pointer;
        -webkit-transition: border .3s ease-in;
        transition: border .3s ease-in;
    }
    .drag-list:hover {
        border: 1px solid #20a0ff;
    }
    .drag-title {
        font-weight: 400;
        line-height: 25px;
        margin: 10px 0;
        font-size: 22px;
        color: #1f2f3d;
    }
    .ghost-style{
        display: block;
        color: transparent;
        border-style: dashed
    }
</style>
